Method for producing modified aluminosilicate, modified aluminum silicate and method for producing aromatic dihydroxy compound using the modified aluminum silicate

摘要

Problem to be solved: to provide a method of producing modified aluminum silicate, a modified aluminum silicate and a method of producing an aromatic dihydroxy compound using the same.A method of manufacturing a modified aluminosilicate according to the present invention is a first step of treating aluminosilicate with acid, and a second step for primary firing primary processing in the first process at 550.degree. C. to 850.degree. C. and firing material obtained in the second process A third step of drying and secondary firing after contacting the liquid containing one or more elements selected from the group consisting of group 4 elements and group 5 elements in the periodic table.The modified aluminosilicate contained in the present invention contains one or more elements selected from the group consisting of group 4 elements and group 5 elements in the periodic table, and the absorbance (a [300]) of 300 nm of the ultraviolet visible spectrum shows more than 1.0.The method for producing aromatic dihydroxy compounds of the present invention comprises the step of reacting phenols with hydrogen peroxide in the presence of a specific modified aluminum silicate.